Electrical musical instrument



1967 B. o. BRODIN 3,335,629

ELECTRICAL MUSICAL INSTRUMENT Filed Jan. 21, 1966 4 Sheets-Sheet 1 Fig.2

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1967 B. o. l. BRODIN ELECTRICAL MUSICAL INSTRUMENT 4 Sheets-Sheet FiledJan. 21, 1966 V DC INVENTOR BY M M Aug. 15, 1967 B. o. l. BRODINELECTRICAL MUSICAL INSTRUMENT 4 Sheets-$heet ti Filed Jan. 21, 1966INVENTOR Aug. 15, 1967 B. o. l. BRODIN ELECTRICAL MUS ICAL INSTRUMENT 4Sheets-Sheet 4 Filed Jan. 2l, 1966 INVENTOR BY WM United States Patent3,335,629 ELECTRICAL MUSICAL INSTRUMENT Bengt Olof Ingemar Brodin,Vastra Frolunda, Sweden, assignor to Job. Mustad AB, Goteborg, Sweden,21 Swedish corporation Filed Jan. 21, 1966, Ser. No. 522,300

Claims priority, application Sweden, Feb. 16, 1965,

1,957/ 65 Claims. (Cl. 84-1) The main feature of the invention is to beseen therein instruments with a manual, which instruments with advantageare carried in a shoulder belt.

The main feature of the invention is to be seen therein that the manualon its chassis is arranged in a tube which is provided with alongitudinal opening in the tube wallthrough which the manual can bereached with one hand. Due to its simple construction the instrumentwill be cheap in manufacture. It will further have a low weight and beeasy to handle.

When the instrument is provided with a tone selector, as the case is asa rule, the push buttons switchers-carried on a chassis-of the toneselector as a unit arranged in the tube in an extension of the chassisof the manual, the tube wall being provided with a second openingthrough which the push button switchers can be reached by the otherhand.

The invention will now be described with reference to the accompanyingdrawings which are intended to illustrate the invention which thus isnot limited to the embodiments shown and described. In the drawings:

FIG. 1 is a plan view of an instrument according to the invention,

FIG. 2 is a plan view of the tube proper,

FIG. 3 shows on a somewhat enlarged scale a plan view of the manual withits chassis,

FIG. 4 is a plan view of the tone selector with its chassis,

FIG. 5 shows a cross section through the instrument on the line VV inFIG. 1,

FIG. 6 shows a cross section FIG. 1,

FIG. 7 is a cross section on the line VII-VII in FIG. 1,

FIG. 8 shows on a still larger scale a part of a longitudinal section onthe line VIIIVIII in FIG. 5.

FIG. 9 is a side elevation shown partly in longitudinal on the lineVI-VI in section of the right hand end of the instrument according toFIG. 1, and

FIG. 10 illustrates how the instrument is intended to be used.

The tube 1 of the instrument is sup-posed to be manufactured fromaluminum or another light metal. However, it could also be manufacturedfrom a synthetic resin. At the two ends of the tube there is attached ashoulder belt 2. The tube is provided with two elongated openings, viz.a longer one 3 for the manual 4 of the instrument and a shorter one 5for the tone selector 6 of the instrument. The Openings 3 and 5 aresituated in such a way that When the instrument is carried in theshoulder belt 2 the manual 4 is within comfortable reach of the righthand of the player and the push button swithers 7 of the tone selector 6are within comfortable reach of the players left hand as illustrated inFIG. 10

The chassis 8 carrying the manual 4 is provided with a carrying rail 9which by means of angular brackets 10 at the ends is arranged ondisk-shaped cross pieces 11, 12, fitting the internal diameter of thetube 1. Another rail 13 extends between the cross bars 11, 12 and servesas an abutment for a limiting of the movement upwards of the keys 14after the pushing down of the same. The manual 4 is of a constructionwhich is independent of the in- "ice vention and for this reason it willnot be described in detail in this connection. The manual 4 with itschassis 8 could as a unit be inserted from the right hand end 15 and beattached in a position with the manual 4 situated in front of theopening 3 by means of screws 16 which extend through the tube wall andare screwed into the cross bars 11, 12. This end is thereupon closed bymeans of a cover 17 and provided with a border flange 18 which engagesthe tube end 15.

The chassis 19 carrying the push button switches 7 of the tone selector6 comprises two angular sheets 20, 21 which eXtend between todisk-shaped cross pieces 22, 23. The cross pieces 22, 23 and the angularsheets 20, 21 serving as distance pieces are kept together by means ofbolts 24. The switchers 7 are attached either to the end piece 22 or tothe angle sheet 21. The chassis 19 further carries a pair ofpotentiometers 25, 26 for the volume control and tuning of theinstrument. There is at the end of the cross piece 22 situated oppositethe tone selector attached a bracket 27 which on isolators 28 carries aso-called printed circuit 29 for the different electric couplings of theinstrument.

The chassis 19 with its different portions is as a unit insertable fromthe left hand end in such a way that the printed circuit 29 will besituated in a space 30 in the tube 1 between the tone selector 6 and themanual 4. The chassis 19 is attached by means of screws 31 which extendthrough the tube wall and are screwed into the cross pieces 22, 23. Thisend of the tube 1 is then closed by means of a cover 32. A number ofelectric wires (not shown in the drawings) connect the printed circuit29 with the electric contacts 33 under the manual 4. The instrument(FIG. 10) is by means of a terminal connectable to an amplifier andloudspeaker.

It is obvious from the above that the mounting of the different parts ofthe instrument is simple to carry out. During the playing the keys 14 ofthe manual 4 and also the push button switchers 7 of the tone selector 6are easily available.

The invention has been described in the foregoing for purposes ofillustration only and is not intended to be limited by this descriptionor otherwise except as defined in the appended claims. Thus, thedifferent parts of the instrument could be modified in many ways withoutdeparture from the inventive idea. The chassis 8 and 19 could be givenother forms than the ones shown in the drawings. Further, it is possibleto connect the two chassis 8 and 19 and to insert them as a unit fromone side of the tube 1. The tube may comprise two halves with the joint(or joints) extending in the longitudinal direction of the tube.

The tube has in the drawings been shown as having a circular crosssection. However, it may also have an oblong or square cross section oranother polygonal cross section. It is also possible to manufacture thetube in two interconnected halves the parting plane of which extends inthe longitudinal direction of the tube.

I claim:

1. In an improved electrical instrument, a manual, a shoulder belt forcarrying said instrument, said manual arranged on a chassis, saidchassis arranged in a tube, said tube provided with a longitudinalopening in its wall, said opening giving access to said manual.

2. In an improved electrical instrument, a manual, a shoulder belt forcarrying said instrument, said manual arranged on a chassis, saidchassis arranged in a tube, said tube provided with a longitudinalopening in its wall, said opening giving access to said manual, a toneselector provided with push button switchers, a chassis carrying saidpush button switchers and shaped for being inserted as a unit into theelongation of said chassis of said manual, said tube having in its walla second opening through which said push button switchers can be reachedby the hand not playing on the manual.

3. In an improved electrical instrument, a manual, a shoulder belt forcarrying said instrument, said manual arranged on a chassis, saidchassis arranged in a tube, said tube provided with a longitudinalopenings in itswall, said opening giving access to said manual, saidchassis of said manual comprising a number of carrying rails, saidcarrying rails being parallel to each other and with their ends arrangedat cross pieces fitting the internal diameter of said tube, said crosspieces, after the insertion into said tube of the unit comprising saidmanual and said chassis, attached to said tube preferably by means ofscrews extending through the tube wall.

4. In an improved electrical instrument, a manual, a shoulder belt forcarrying said instrument, said manual arranged on a chassis, saidchassis arranged in a tube, said tube provided with a longitudinalopening in its Wall, said opening giving access to said manual, a toneselector provided with push button switchers, a chassis carrying saidpush button switchers and shaped for being inserted as a unit into theelongation of said chassis of said manual, said tube having in its walla second opening through which said push button switchers can be reachedby the hand not playing on the manual, said push button switcher chassiscomprising two cross pieces arranged at a certain distance from eachother and fitting the internal diameter of said tube and two anglesheets, said sheets arranged between said cross pieces and serving asdistance pieces and also as carrying means for said switchers.

5. In an improved electrical instrument, a manual, a shoulder belt forcarrying said instrument, said manual arranged on a chassis, saidchassis arranged in a tube, said tube provided with a longitudinalopening in its wall, said opening giving access to said manual, a toneselector provided with push button switchers, a chassis carrying saidpush button switchers and shaped for being inserted as a unit into theelongation of said chassis of said manual, said tube having in its walla second opening through which said push button switchers can be reachedby the hand not playing on the manual, said push button switcher chassiscomprising two cross pieces arranged at a certain distance from eachother and fitting the internal diameter of said tube and two anglesheets, said sheets arranged between said cross pieces and serving asdistance pieces and also as carrying means for said switchers, saidcross pieces of said tone selector chassis situated in the vicinity ofsaid manual carrying a printed circuit for the electric couplings of theinstrument, said printed circuit arranged on a bracket extending into aspace in said tube between said two chassis.

No references cited.

RICHARD B. WILKINSON, Primary Examiner.

C. M. OVERBEY, Assistant Examiner.

1. IN AN IMPROVED ELECTRICAL INSTRUMENT, A MANUAL, A SHOULDER BELT FOR CARRYING SAID INSTRUMENT, SAID MANUAL ARRANGED ON A CHASSIS, SAID CHASSIS ARRANGED IN A TUBE, SAID TUBE PROVIDED WITH A LONGITUDINAL OPENING IN ITS WALL, SAID OPENING GIVING ACCESS TO SAID MANUAL. 